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Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

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Abstract

Platinum nanoparticles were synthesized by a classic polyol process in ethylene glycol. The Pt nanoparticles were loaded on H-ZSM5 and γ-Al2O3 supports by wet impregnation. The as-obtained solid was thermally treated in a two-step procedure to remove the organic residues. Due to their larger particle size than the micropore size of H-ZSM5, the impregnated Pt particles were dispersed on the external surface of the zeolite support. With similar Pt particle size distribution and Pt loading, the Pt/H-ZSM5 and Pt/γ-Al2O3 catalysts were evaluated for the oxidation of NO and soot. Despite its lower activity for NO oxidation to NO2, the Pt/H-ZSM5 exhibited a much higher activity for soot oxidation in the presence of NO + O2. This abnormal NOx-assisted soot oxidation behaviour of Pt/H-ZSM5 was explained by the promoting effect of the acid sites on the zeolite.

Graphical abstract: Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

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Publication details

The article was received on 31 May 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7CY01087G
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Controllable synthesis of supported platinum catalysts: acidic support effect and soot oxidation catalysis

    Y. Gao, W. Yang, X. Wu, S. Liu, D. Weng and R. Ran, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01087G

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